3. When (1R,2S)-1-bromo-2-methylcyclohexane is heated with sodium methoxide in m

Question

3.

When (1R,2S)-1-bromo-2-methylcyclohexane is heated with sodium methoxide in methanol, the major product is

A) 1-methylcyclohexene.
B) (R)-3-methylcyclohexene.
C) (R)-4-methylcyclohexene.
D) (S)-4-methylcyclohexene.
E) (S)-3-methylcyclohexene.

4.

When (1R,2S)-1-bromo-2-methylcyclohexane is heated with sodium methoxide in methanol, the minor product is

A) (S)-4-methylcyclohexene.
B) (R)-3-methylcyclohexene.
C) (R)-4-methylcyclohexene.
D) 1-methylcyclohexene.
E) (S)-3-methylcyclohexene.

5.

Which base gives the largest amount of Hofmann product when reacted with 2-bromo-2,3-dimethylbutane?

A) sodium propoxide
B) sodium tert-butoxide
C) sodium isopropoxide
D) sodium methoxide
E) sodium ethoxide

Explanation / Answer

i guess that 3) B 4) D 5)C

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